widely talked about as a strong candidate; highly touted
Used when someone is frequently mentioned as a likely choice for a role, position, or award. Often followed by a noun indicating the role (e.g., 次期社長). The variant 呼び声の高い is also common.
See also: 呼び声の高い
He is widely talked about as the next company president.
That player is highly touted for MVP.
Compound of 呼び声 (call, reputation) + が (subject marker) + 高い (high, loud). Literally 'the calling voice is loud', figuratively meaning someone's name is being called out loudly as a candidate.